A stock market correction is a decline of at least 10 percent in a broad index from its recent closing peak, ending only when the index reaches a new high. The S&P 500 has logged 22 such declines since 1950 on monthly closing data through September 2026. The pace depends on the measuring stick.
Corrections tend to start without a starting gun. Company profit reports give the market its first hard test of expectations, and the earnings season calendar sets that test four times a year. The rest is arithmetic and patience.
Below: the definition in practice, the frequency record since 1950, and what the recovery math means for a portfolio held across decades. The markets-news desk flags these drawdowns as they develop.
What Exactly Counts as a Correction?
The common threshold is a decline of at least 10 percent from a recent closing high to the closing low that follows, measured on a broad market index such as the S&P 500. A fall of 20 percent or more is classified as a bear market, per the standard usage summarized on Wikipedia. Corrections are labeled in hindsight, because nobody knows the closing low until prices stop falling and climb past the old peak.
The endpoint matters as much as the drop. Per Wikipedia’s definition, a correction ends once stocks attain new highs, which means a decline and its recovery are one event rather than two. The same 10 percent move in a single stock or a narrow sector carries different weight than the same move in the headline index. We covered a connected angle in January 2026 Inflation Slowed to 2.4 Percent.
How Often Do Corrections Happen?
Measured on monthly closing values from the Shiller S&P 500 dataset, January 1950 through September 2026, a 10 percent decline from a peak has arrived 22 times, roughly one every three and a half years. Eight of the 22 reached 20 percent or deeper, entering bear market range. The average depth across all 22 came to about 20 percent.
Monthly averages smooth away the fastest dips, so counts on daily closing data run higher. Wikipedia’s record of the most recent example uses daily closes: the S&P 500 fell 18.9 percent from February 19 to April 8, 2025, and set a new high on June 27, 2025. Recent monthly-close corrections included 2022, 2020, 2018, and 2011. For related coverage, see Why Most Actively Managed Funds Underperform the S&P 500 Long Term.
How Long Do Corrections Last, and How Fast Do Markets Recover?
From peak to trough, the 22 monthly-close corrections ran about nine months on average, per the same dataset. The climb back to the prior peak averaged close to 17 months, with a median near 10. Half of the group regained the old high within roughly six months; the slowest cases took four years or more.
- The 2020 correction bottomed in five months and recovered in five, per the monthly data.
- The 2011 decline took about five months from trough back to its prior peak.
- The 2007 to 2009 drop, 50.8 percent at its deepest, needed 48 months to reach a new high.
- The decline that began in 2000 needed 68 months from its trough to regain the old peak, per the same record.
Do Corrections Change the Math for a Long-Term Portfolio?
The base rate says drawdowns are routine, not exceptional: at one every three and a half years, a multi-decade holder sits through several. The spread of outcomes matters more than the average. Some declines recover in a season; the 2000s cases stretched across years. Past frequency describes history, and the record carries no schedule for the next one.
What the data does establish is the shape: 10 percent down is common, 20 percent down is less common but far from rare at eight of 22, and recoveries begin only after a new high prints. A portfolio built for decades absorbs those rhythms rather than trading around them, since selling into the trough is the part of the sequence the record punishes hardest.
Conclusion: How Should You Read the Next Correction?
Check the definition first: a stock market correction means a drop of 10 percent or more from a peak, confirmed only in hindsight once a new high arrives. Then place it in the record, where 22 corrections since 1950 average about 20 percent deep, roughly nine months down, and near 10 months at the median recovery. The base rate makes dips ordinary; the calendar remains unwritten.
